Unenroll Previous Email In Teams

Question

I recently switched companies and when setting up the Outlook app on my iphone for the new company I received the following misconfiguration alert.

"Your admin wants the apps on this device to me managed with the account (old email). The app account you are using (current email) will be removed. To access your organization's data with the account (new email) you must un-enroll your device from the Company Portal."

However, I don't have access to my old account because the account was closed.